I am on the lookout for a small chunk of land in the bush out of town. When I buy it, my plan is to set up an aquaponics greenhouse that can feed myself and the main squeeze into our old age, so we can spend more of our retirement savings on hookers and blow.
Aquaponics has a very high yield per acre of fruit, vegetables, and protein, requires very little water to maintain, and once established, not a whole lot of monitoring.